I am using jboss\'s rest-easy multipart provider for importing a file. I read here http://docs.jboss.org/resteasy/docs/1.0.0.GA/userguide/html/Content_Marshalling_Providers.html
You could use @PartFilename but unfortunately this is currently only used for writing forms, not reading forms: RESTEASY-1069.
Till this issue is fixed you could use MultipartFormDataInput as parameter for your resource method.
MultipartFormDataInput